refrigeration vs therapy

refrigeration and therapy both are nouns.

Word	Noun	Adjective	Verb	Adverb
refrigeration	Yes	No	No	No
therapy	Yes	No	No	No

As nouns, therapy is a hypernym of refrigeration; that is, therapy is a word with a broader meaning than refrigeration:

refrigeration: deliberately lowering the body's temperature for therapeutic purposes
therapy: (medicine) the act of caring for someone (as by medication or remedial training etc.)

Other hypernyms of refrigeration include treatment.

refrigeration (noun)	therapy (noun)
deliberately lowering the body's temperature for therapeutic purposes	(medicine) the act of caring for someone (as by medication or remedial training etc.)
the process of cooling or freezing (e.g., food) for preservative purposes